JP2013226543A5 - - Google Patents
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- JP2013226543A5 JP2013226543A5 JP2013062344A JP2013062344A JP2013226543A5 JP 2013226543 A5 JP2013226543 A5 JP 2013226543A5 JP 2013062344 A JP2013062344 A JP 2013062344A JP 2013062344 A JP2013062344 A JP 2013062344A JP 2013226543 A5 JP2013226543 A5 JP 2013226543A5
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- temperature
- concentration
- ammonium sulfate
- denitration catalyst
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 11
- BFNBIHQBYMNNAN-UHFFFAOYSA-N Ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 4
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 4
- 235000011130 ammonium sulphate Nutrition 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 229910002089 NOx Inorganic materials 0.000 description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitrogen oxide Substances O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000003638 reducing agent Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 229910052803 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229910052813 nitrogen oxide Inorganic materials 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N sodium Chemical group [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Description
このように、高濃度のＳＯｘおよびＮＯｘが存在し、排ガス温度が低い船舶用機関から排出される排ガスの浄化処理で、アンモニアＳＣＲ法による脱硝触媒を使用するには、硫安の析出温度を排ガス温度以下にする必要がある。硫安の析出温度は、ＳＯ３濃度とＮＨ３濃度で決定される。ＮＨ３濃度は排ガス中のＮＯｘ濃度と目標脱硝率で決まるため、この値を低減することはできない。従って、排ガス温度が硫安の析出温度より低い船舶用機関では、還元剤として使用するアンモニア（ＮＨ３）を吹き込む前に排熱を利用して、排ガス温度を再加熱して硫安の析出温度以上にすることで、アンモニアＳＣＲ法による脱硝触媒の使用を行っている。
Thus, in order to use a denitration catalyst by the ammonia SCR method in the purification treatment of exhaust gas discharged from a marine engine having a high concentration of SOx and NOx and having a low exhaust gas temperature, the precipitation temperature of ammonium sulfate is set to the exhaust gas temperature. Must be: The precipitation temperature of ammonium sulfate is determined by the SO 3 concentration and the NH 3 concentration. Because NH 3 concentration determined by the NOx concentration and the target denitrification efficiency in exhaust gas, it is not possible to reduce this value. Therefore, in a marine engine whose exhaust gas temperature is lower than the precipitation temperature of ammonium sulfate, exhaust gas is reheated before blowing ammonia (NH 3 ) used as a reducing agent, and the exhaust gas temperature is reheated to exceed the precipitation temperature of ammonium sulfate. By doing so, the denitration catalyst by the ammonia SCR method is used.
本発明による燃焼排ガスの浄化方法は、燃焼排ガスの浄化方法であって、−７以下のハメットの酸度関数Ｈ０に相当する酸強度を有するナトリウム型ゼオライトに水素およびコバルトを担持させた脱硝触媒に、還元剤としてアルコ−ルを添加した燃焼排ガスを、１８０〜３００℃の温度において接触させることにより、排ガス中の窒素酸化物を除去することを特徴としている。 Method for purifying flue gas according to the present invention is a method for purifying combustion exhaust gas, by supporting hydrogen and cobalt in the sodium form zeolite with an acid strength equivalent to Hammett acidity function H 0 of -7 or less Nitrogen oxides in the exhaust gas are removed by bringing the combustion exhaust gas in which alcohol as a reducing agent is added to the denitration catalyst at a temperature of 180 to 300 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013062344A JP6134552B2 (en) | 2012-03-30 | 2013-03-25 | Combustion exhaust gas purification method and denitration catalyst |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012080533 | 2012-03-30 | ||
| JP2012080533 | 2012-03-30 | ||
| JP2013062344A JP6134552B2 (en) | 2012-03-30 | 2013-03-25 | Combustion exhaust gas purification method and denitration catalyst |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2013226543A JP2013226543A (en) | 2013-11-07 |
| JP2013226543A5 true JP2013226543A5 (en) | 2016-03-03 |
| JP6134552B2 JP6134552B2 (en) | 2017-05-24 |
Family
ID=49674803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2013062344A Active JP6134552B2 (en) | 2012-03-30 | 2013-03-25 | Combustion exhaust gas purification method and denitration catalyst |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6134552B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6393591B2 (en) | 2014-11-12 | 2018-09-19 | 日立造船株式会社 | Aldehyde decomposition catalyst, exhaust gas treatment facility, and exhaust gas treatment method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07106300B2 (en) * | 1989-12-08 | 1995-11-15 | 財団法人産業創造研究所 | Method for removing nitrogen oxides in combustion exhaust gas |
| US5451385A (en) * | 1991-08-01 | 1995-09-19 | Air Products And Chemicals, Inc. | Control of exhaust emissions from methane-fueled internal combustion engines |
| US5149512A (en) * | 1991-08-01 | 1992-09-22 | Air Products And Chemicals, Inc. | Catalytic reduction of NOx using methane in the presence of oxygen |
| JPH05317650A (en) * | 1992-05-22 | 1993-12-03 | Sakai Chem Ind Co Ltd | Catalyst for catalytic reduction of nitrogen oxide |
| JPH06320008A (en) * | 1993-05-10 | 1994-11-22 | Sekiyu Sangyo Kasseika Center | Catalyst for catalytic reduction of nox |
| JPH09150035A (en) * | 1995-11-28 | 1997-06-10 | Tosoh Corp | Method for removing nitrogen oxide |
| JP3197857B2 (en) * | 1997-11-10 | 2001-08-13 | 財団法人産業創造研究所 | DeNOx method |
| US20030073566A1 (en) * | 2001-10-11 | 2003-04-17 | Marshall Christopher L. | Novel catalyst for selective NOx reduction using hydrocarbons |
-
2013
- 2013-03-25 JP JP2013062344A patent/JP6134552B2/en active Active
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